usb: host: replace xhci-keystone driver by the generic dwc3 driver

The keystone platforms can use the generic DC3 driver. Removing the
keystone-spcecific xchi driver and add the configuration options to enable
the generic DWC3 driver on all K2 platforms.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/k2g_hs_evm_defconfig b/configs/k2g_hs_evm_defconfig
index 66d8220..47c30a6 100644
--- a/configs/k2g_hs_evm_defconfig
+++ b/configs/k2g_hs_evm_defconfig
@@ -29,6 +29,7 @@
 CONFIG_DM=y
 # CONFIG_BLK is not set
 CONFIG_SYS_I2C_DAVINCI=y
+CONFIG_MISC=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
@@ -43,6 +44,8 @@
 CONFIG_PHY_MICREL=y
 CONFIG_DM_ETH=y
 CONFIG_MII=y
+CONFIG_PHY=y
+CONFIG_NOP_PHY=y
 CONFIG_REMOTEPROC_TI_POWER=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
@@ -50,7 +53,10 @@
 CONFIG_DM_SPI=y
 CONFIG_DAVINCI_SPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y
+CONFIG_USB_DWC3=y
+CONFIG_USB_DWC3_GENERIC=y
 CONFIG_USB_STORAGE=y
 CONFIG_DRIVER_TI_KEYSTONE_NET=y